added _(...).createCallback def

lodash/lodash-tests.ts

@@ -504,8 +504,11 @@ result = <Function>_.compose(greet, format);
 result = <_.LoDashWrapper<Function>>_(greet).compose(format);
 
 var createCallbackObj = { name: 'Joe' };
-var pluckCallback: () => any = _.createCallback('name');
-var whereCallback: () => boolean = _.createCallback(createCallbackObj);
+result = <() => any>_.createCallback('name');
+result = <() => boolean>_.createCallback(createCallbackObj);
+result = <_.LoDashWrapper<() => any>>_('name').createCallback();
+result = <_.LoDashWrapper<() => boolean>>_(createCallbackObj).createCallback();
+
 
 var curried: Function = _.curry(function(a, b, c) {
   console.log(a + b + c);

lodash/lodash.d.ts

@@ -2058,6 +2058,15 @@ declare module _ {
 		thisArg?: any,
 		argCount?: number): () => boolean;
 
+		interface LoDashWrapper<T> {
+			/**
+			* @see _.createCallback
+			**/
+			createCallback(
+				thisArg?: any,
+				argCount?: number): LoDashWrapper<() => any>;
+		}
+
 	/**
 	* Creates a function which accepts one or more arguments of func that when invoked either 
 	* executes func returning its result, if all func arguments have been provided, or returns